These should be handy when we add more declaration forms for Harmony.

R=svenpanne@chromium.org
BUG=

Review URL: https://chromiumcodereview.appspot.com/10897010

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@12404 ce2b1a6d-e550-0410-aec6-3dcde31c8c00